Bolster spring seat stop



Feb. l5, 1927.

v v C. F. HUNTOON 'l BoLsTER sPRINs SEAT STOP Filed Oct. l2, 1925Patented Feb. 15, 1927.

UNITED STATES PATENT OFFICE..

BOLSTER SPRING SEAT STOP.

Application filed October 12, 1925. Serial No. 62,050.

The invention relates to improvements in truck belsters ot' the typeshown in Patent No. 1,210,478, January 2. 1917, and more particularly tothe manner ot holding the spring seat block to prevent the same fromshifting and breaking the cast end guides.'

It is chiefly characterized by providing a stop or lug secured to thetop wall of the inverted spring` seat pocket, which lug is engaged by asuitable recess in the upper surface of the spring block.V The springblock, in other respects, fits loosely in the pocket.

It has been found that in many instances in the present practice ofloosely fitting a wooden or cast iron spring block into the wedge-shapedpockets in the ends of the bolster, the breakage of the end castings hasbeen due to lateral shifting of the spring block under the strain of thelurching and side swaying` of the car body.

It would be manifestly impractical to secure the spring block in anyordinary manner to the end castings against lateral shifting. but it isentirely practical to attach a stop against such shifting to the upperwall of the pocket because the upper wall is furnished by the trussmembers which are made of rolled steel material.

An object of this invention is to provide such a stop which is simpleand substantial and will not add materially to the cost of the bolster.

Further objects and advantages will appear in the following descriptionwith reference to the accompanying drawings, in which an illustrativeembodiment of this invention is shown.

In the drawings:

Figure 1 is an elevation of the truck bolster.

Fig. 2 is an inverted' plan view.

Fig. 8 is a central section of Fig. 1.

Fig. 4 is a perspective view of the spring block.

Fig. 5 shows the stop member.

In a trussed truck bolster the upper member is an inverted channel,bowed upward in the center and having the ends bent upwardly to join theends of the inversely bent flat lower member. The lower member isthickened at the ends to provide a shoulder for abutting with the outerends of the web of the upper member to prevent shearing the rivets, ofwhich there are usually three at frames each end. and which fasten theends of the upper and lower members together. A cast iron end member isordinarily used to enclose the ends of the truss for reinforcing it andproviding lateral wearing and guide surfaces for engaging with the truckside and for providing an inverted pocket, formed by the walls of theend member and the under surface of the lower truss member, into whichis loosely fitted a cast iron or wooden spring seat block. Y

In the present improvement a cylindrical stop member, having aconcentric counterbored hole, is placed under the middle rivet head withthe head fitting in the counterbored recess. This provides a shoulderedprojection secured to the upper surface of the pocket.

The spring block is provided with a recess in its upper surfacewhichclosely engages the stop member, while the remaining lateral surfaces ofthe spring block clear the adjacent surfaces of the pocket. i

Referring in detail to the drawings, the truck bolster 1 receives, withlimitedA pivoting, kthe center of the car bolster, which supports theend of the car. on thecentrally located member 2. The ends 3 of thetruck bolster 1 engage with openings in the truck side. frame and reston the car springs 4, and side rocking of the car is stopped by the sidebearings 21. This is more fully illustrated in my Patent No. 1,176,063,grant-ed March 21, 1916.

The upper truss member 5 is bowed upwardly in the center and the ends 6are upturned to rest on the ends 7 of the flat lower truss member 8. Themedial portions of 5 and 8 are spaced by the strut 9 and the ends 6 and7 are secured together by the rivets 10, of which there are usuallythree, spaced as shown.

The inverted spring pocket 11 is formed at the ends of the bolster 1 bymeans of the end casting 12, which laterally encloses the said ends andis secured to the marginal fianges 13 of the upper truss member 5 by therivets 14. Side movement of the bolster 1 is stopped by the verticalshoulders 15 formed on the end member 12, which abut the inner flangesof the openings in the truck frame.

Thus it will be seen that the pocket 11 is necessarily wedge-shapedintransverse section and the upper wall 16 formed by the Cil lower surfaceof the truss member 8 slopes inwardly. The spring seat block 17 fitsloosely in the pocket 11 and is recessed as at 18 to clear other lateralsurfaces.

To prevent lateral shifting, l provide a recess 19 in the upper surfaceof the spring block 17 which is adapted to closely engage with the stop2O secured to the rolled steel member 8.

The stop Q0 is cylindrical with a central hole 21 having' the concentricrecess 22 and is placed under the head of the middle truss rivet 10',with the rivet head Q3 countersunk in the recess 22.

Thus the improvement is accomplished by the addition of one simplemember Q0, and

a rivet 10, which is already in the bolster, is used for securingthestop in place.

It is manifest that with the car in motion, sudden and severe shocks arereceived by the spring blocks, as for instance in a side lurchbeingstopped by the side bearing 21. @wing to the slope of the top 16 ofthe pocket 11, considerable force is developed to drive the wedge-shapedspring block 17 outwardly against the end wall of the member 12, whichmay easily be sufficientto break the same. l

It can also be seen that forces are constantly being developed forshifting` the spring` block 17 about in the pocket 11, and that theshifting is now stopped in a very simple and efficient manner withoutweakening` the spring block.

Although but one specific embodiment of this invention has been hereinshown and described, it will be understood that the construction shownlmay be altered without departing from the spirit of this invention asdefined by the following claims.

I claim:

1. In a truck bolster having,` an inverted pocket formed at each endthereof, a cylin drical member secured to the upper wall of the pocketforming a shouldered projection, a spring seat block loosely fitting' insaid pocket and having, a recess adapted to closely engage with saidmember.

2. In combination, in a trussed truck bolster havinga channel-shapedupper truss member hafiirq upturned ends. a lower flat truss memberjoined at the ends to the web at the ends of the upper truss member bymeans of rivets. and end reinforcing member secured over the joined endsof the truss 3' members, forming," at each end an inverted pocket withan inwardly sloping top Wall in which are located the heads of saidrivets, a recessed disk member under the heads of one centrally locatedrivet, and a spring block fittingl loosely in said pocket and having arecess adapted to engage said disk member.

3.111 a truck bolster having inverted pockets having inwardly slopingtopwalls and a rivet head located therein, a recessed cylindrical memberunder the rivet head and receivingthe head in the said recess andforming a shouldered projection, and a spring` block loosely fitting inthe said pocket and having` a recess engaging;` said shoulderedprojection.

Signed at South Pasadena, California, this 3rd day of September, 1925.

CHARLES F. HUNTOON.

